Pulley for metallic window-frames.



No. 741,990. 7 PA'TBNT'ED 09m. 20", 1999.;

- 9 9 W. 1), WATSON.

PULLEY FOR METALLIC WINDOW FRAMES.

APPLICATION FILED APR. 6. 1903.

N0 MODEL.

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UNITED STATES Patented October 20, 1903.

WILLIAM D. WATSON, OF CHICAGO, ILLINOIS.

PULLE'Y FOR METALLIC WINDOW-FRAMES.

SPECIFICATION forming part of Letters Patent No. 741,990, dated October 2c, 1903.

Application filed April 6, 1903. Serial No. 151,357. (No model.)

To all whom it may concern: I

Be it known that I, WILLIAM D. WA'rsoN, a citizen of the United States of America, residing in Chicago, in the county of Oook and State of Illinois, have invented certain new and useful Improvements in Pulleys for Metallic Window-Frames, of which the following is a specification.

This invention has special reference to the housings ofcounter'weight-pulleys for metallic window-frames and also to the coacting con struction of the pulley-casing and metallic frame of the Window, by which they are securely clamped together.

The object of the invention is to provide an improved construction in devices of this character; and it consists in the matters hereinafter set forth, and particularly pointed out in the appended claim.

In the accompanying drawings, Figure 1 is a sectional side elevation showing a counterweight-pulley applied to a metallic windowframe in accordance with my improvements. Fig. 2 is a front end elevation, of the pulley alone. Fig. 3 is a top plan view of the pulley alone; Fig.- 4, a bottom plan view of the pulley alone 5 Fig. 5, a sectional detail showing the manner of clamping the pulley and easing together; Fig. 6, a view of a window, showing the location of the pulleys.

In the construction shown in said drawings the device A comprises, as usual, a rotating sheave-wheel 1, mounted to rotate within a housing 2. This housing is provided with a base-plate 3, comprising projecting flanges 4 and 5, arranged at right angles to each other and adapted to embrace the corner of the metallic window frame or casing B, as shown in Fig. 2. The pulley and easing are then clamped together by bolts 0, which are inserted from the inner side of the casing through apertures in each of the flanges 4 and 5, so that the pulley is secured from two directions, and is thereby rigidly clamped.

in place about the angle of the casing. In

I the present improvement also the security of this connection is enhanced by countersinking the holes in the pulley-flanges on their inner faces, or those which directly engage the casing, as shown at 6 in Fig. 5, and by correspondingly drawing up the sheet metal of the casing to form a conical lug 7, adapted to enter the countersink 6 in the pulley-flange. The bolt 0 employed is then made with a conical head 8, which fits Hush and snugly within the lug 7 of the casing and clamps the wall ofsaid lug firmly between it and the countersunk flange of the pulley when the nut 9 is screwed home. By this construction of pulley and by this method of securing it to the window-casing the pulley is rigidly clamped to the casing entirelyon the outer side of its inner wall and in such manner as to form a projecting and strengthening sheath about the angle of its wall, the peculiar construction of the joint at the bolts being, furthermore, of such interlocking nature as to make the structure as a whole of the greatest rigidity.

The housing, as will be observed, is constructed peculiarly, especially adapting it for a pulley mounted and secured in the peculiar manner shown. It is composed of two parts 10 and 11, secured rigidly together by the rigid shaft 12 of the sheave, the line of separation 13 running centrally and longitudinally through the hood portion and base part 3 and transversely to the axis of the pulley. At the front end'let of the base-plate the line of separation extends downward a short dis.- tance and outward to one edge of the vertical lug' or flange 5, thereby making the main part of flange 5 (the part provided with the fastening bolt-hole 15) integral with part 10 of the'housing and the smaller or supplemental part 5 integral with the other half of the housing: At the rear end of the baseplate the line of separation turns 06 to the side edge of the flange 4 opposite tothe lug 5 thereby making the main part of said flange, containing the bolt-hole 16, integral with the part 11 of the hood and the supplemental part or lug 43 integral with part 10 of the hood.

It will be observed that when the sheaveshaft is inserted in its openingsin the sides of the housing and riveted or otherwise fastened and the device is bolted over the outer upper angle of the inner wall of the windowframe, as shown, the parts will be rigidly locked together and held in alinement without other connecting devices than the sheaveshaft. To further insure the rigidity and alinernent of the parts, the head portion of one of the parts is provided with a lug 17,

which engages a correspondingly-shaped rehollow conical lugs 7 on the casing projecting into the countersunk recesses 6, and clamping-bolts C inserted through said hollow lugs and countersunk recesses and having conical heads 8 fitting into the hollow lugs to bind them within the countersunk recesses and clamp the pulley securely about the angle of the casing, substantially as described.

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two subscribing witnesses, this 6th day of March, A. D. 1903.

WILLIAM D. WATSON.

Witnesses:

HENRY W. CARTER, K. A. COSTELLO. 

